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- Title
连续油管打捞连续油管工艺在低压低产气井中的应用.
- Authors
庞德新; 艾白布·阿不力米提; 朱召召; 郭新维; 杨文新; 郝力博
- Abstract
In order to solve the problem of coiled tubing fishing in the production string of gas wells with low pressures and low production rates, this paper puts forward a technical idea of fishing coiled tubing by using coiled tubing. Combined with the actual characteristics of gas wells with low pressure and low production, a series of special fishing tools were developed. And the technology was applied to Well T1 of Yangtake Condensate Gas Field in the western end of Luntai salient, Tabei uplift, the Tarim Basin. And the following research results were obtained. First, the necessary prerequisite for the smooth fishing operation is to unblock the operating channel by jet flow, verify the shape of the fish top by lead-in printing and determine the normal lifting load range by pull-up tests. Second, by virtue of the spin-in tool, the rotation fishing function of coiled tubing can be realized. By virtue of the catching-cutting tool, the dual purpose of catching fish and cutting fish in extreme cases can be achieved, so as to prevent the operation string from being broken and falling, which may cause a severe downhole accident. Based on the change of pump pressure, the capture detection tool can detect whether the fish top is introduced or not in time, effectively avoiding the situation that the fish is squeezed and broken due to blind loading in the introduction process. Third, Well T1, a gas well with low pressure and low production rate, has been shut down for a long time and its production channel is completely blocked. In addition, there are many variable diameter positions in the operation channel. After this fishing technology is applied in Well T1 for fishing 13 times, the fish top is successfully introduced and fished with a success rate of 100%. In conclusion, this technology is applicable to coiled tubing fishing under the condition of limited space, and it provides an effective solution for the difficult fishing of coiled tubing in the production string of gas wells with low pressures and low production rates.
- Subjects
GAS wells; JETS (Fluid dynamics); GAS fields; CHANNEL flow; TUBES; CUTTING tools
- Publication
Natural Gas Industry, 2020, Vol 40, Issue 1, p76
- ISSN
1000-0976
- Publication type
Article
- DOI
10.3787/j.issn.1000-0976.2020.01.010